1.选择题- (共1题)
1.两只相同的电阻,分别通以正弦形的交流电和方波形的交流电。两种交流电流的最大值相等,如图所示。在正弦形交流电的一个周期内,正弦形的交流电在电阻上产生的焦耳热Q1与方波形交流电在电阻上产生的焦耳热Q2之比Q1/Q2等于( )

2.单项选择- (共3题)
2.
I really appreciate _______ to help me out.
A.you for lending me the money | B.your lending me the money |
C.you to lend me the money | D.it that you lend me the money |
3.
In the survey they listed twelve kinds of food _______would affect the work of the brain.
A.which the experts believed | B.that were believed |
C.the experts believed that | D.the experts believed |
试卷分析
-
【1】题量占比
选择题:(1道)
单项选择:(3道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:3
7星难题:0
8星难题:0
9星难题:0